Train is asking fans to record and submit short videos detailing how they met and their connection to the band. The winners will be married on stage at a Train concert and their families will receive concert tickets so they can attend the weddings. Each ceremony will be followed by a performance of the song "Marry Me."

Underwood is just one of many celebrities who have officiated weddings. Click through the slideshow below to see other famous officiants.

Celebrities Who Married Regular People

Celebrities Who Married Regular People

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Kathy Griffin

Brian Anstey and Elka Shapiro are such big Kathy Griffin fans that they asked the "D-List" celebrity to officiate their wedding in 2008. The comedienne just couldn't refuse their request and told the New York Daily News that they were her "kind of people."